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audit: add filtering for io_uring records

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This patch adds basic audit io_uring filtering, using as much of the
existing audit filtering infrastructure as possible.  In order to do
this we reuse the audit filter rule's syscall mask for the io_uring
operation and we create a new filter for io_uring operations as
AUDIT_FILTER_URING_EXIT/audit_filter_list[7].

Thanks to Richard Guy Briggs for his review, feedback, and work on
the corresponding audit userspace changes.

Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Paul Moore 2021-04-18 21:54:47 -04:00
parent 5bd2182d58
commit 67daf270ce
5 changed files with 64 additions and 20 deletions
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3
include/uapi/linux/audit.h
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@ -167,8 +167,9 @@
#define AUDIT_FILTER_EXCLUDE 0x05 /* Apply rule before record creation */
#define AUDIT_FILTER_TYPE AUDIT_FILTER_EXCLUDE /* obsolete misleading naming */
#define AUDIT_FILTER_FS 0x06 /* Apply rule at __audit_inode_child */
#define AUDIT_FILTER_URING_EXIT 0x07 /* Apply rule at io_uring op exit */
#define AUDIT_NR_FILTERS 7
#define AUDIT_NR_FILTERS 8
#define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */